From: "Olinger, Patricia L" <patty.olinger**At_Symbol_Here**EMORY.EDU>
Subject: Re: [DCHAS-L] working with nanomaterial
Date: October 12, 2012 7:11:54 AM EDT
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
I've worked with Flow, and Ray Ryan (President of FlowSciences) for years. Ray and his team have been involved in the development of the new guidelines and they have a lot of data available on containment capabilities.
There are testing strategies that if you are into banding of chemicals or particle size that can be utilized. The Engineers at Flow should be able to help with that. There is another company that is well versed on the subject of testing. SafeBridge.
The flow science hoods are great, really inexpensive when you take into consideration the flexibility and the containment factors. In a previous life, I had them custom made for robotics and high through put screening, we used the standard hoods for
potent compound weighing, here at Emory we have purchased some for animal work, etc.
Patty Olinger, RBP
Director EHS, Emory University
I use a low flow hood manufactured by Flow Sciences,
http://www.flowsciences.com/brNanotechnology/tabid/66/Default.aspx, for carbon nanotube weighing operations. I ordered the hood with a white base instead of black so operators could see surface contamination more easily. I also use the waste chute feature
to capture residual particles from empty bags, weighing tools, outer gloves, surface coverings, and wet wipes. I agree with other posts that operators should be trained to use slow arm movements to avoid overcoming low flow rates.
Michael Ellenbecker and Candace Tsai at UMass Lowell have done several studies on enclosure effectiveness for nanoparticle handling operations.
Cena, Peters (2011)
Betsy Shelton, MSIH
On Tue, Oct 2, 2012 at 8:00 AM, Yung Morgan
Does anyone have a source on a containment system for safely weighing dry nanomaterial? A chemical hood is usually too turbulent for the accuracy of a Mettler
balance. Any thought you have including precaution(s) to take for this type of work would be appreciated.
Thank you and keep up the great work you do.
Yung Morgan, MsPH
Industrial Hygiene Services
Environmental Health and Safety
117 Draper hall
UMASS,Amherst MA 01003
Fax (413) 545-2600
email : pmorgan**At_Symbol_Here**ehs.umass.edu
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